I can only run my computer when underclocked

Amd Phenom ii x3 720 triple core process...
October 29, 2009 at 15:03:37
Specs: Windows Vista, Phenon 2.2ghz 4gb
My computer will only load windows when I greatly underclock my cpu to 1ghz.
It is surpossed to be 2.2ghz quad core.
I try to increase the CPU multiplyer from 5.5 to 6 and the system crashes half way through windows loading.
I increased the voltage by a tiny amount with a small increase in stability it loaded in to windows and I can get online, but when I tried to run bench marking it crashes.
I have had 3 different PSU's thinking it was causing the problem, 2 cheap win power 800w models and the new one I have just installed OCZ stealth xstream 600w
with same problems.

I now suspect that the settings in the BIOS are incorrect, could some one please help
SPEC:
AMD PHENOM 9650
2GB GEIL DDR2 800
GIGABYTE M/B GA770 ATX
NVIDIA 8800 GTS
2x Western digital sata 250gb RAID 0


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#1
October 29, 2009 at 15:40:26
There should be a selection to reset bios to default settings. That may or may not help you but if you can do it within the bios screen (not a jumper) you can compare settings written down before and after. Look for faulty voltage or memory timings and multipliers.

If you set all to default and it fails then either onboard clock is starting to fail and may be not clean enough to work at correct speed or some hardware is going bad. Reduce to minimum removable parts and try again.

Playing to the angels
Les Paul (1915-2009)


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#2
October 29, 2009 at 15:52:49
I set every thing to defaulf fail safe settings in BIOS and the computer would not boot at all any ideas.
I have noe changed the settings back to 5x cpu multiplyer running 1 ghz.
You said it could be bad components what parts do you suggest it could be. What is onboard clock.

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#3
October 29, 2009 at 15:55:04
Post the exact model of your Gigabyte board. There are many versions using that chipset.

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Related Solutions

#4
October 29, 2009 at 16:02:50
GA-MA770-DS3

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#5
October 29, 2009 at 16:31:52
Version 1.0 or 2.0? That will be printed somewhere on the edge of the board.

I ask because I am trying to verify your CPU is fully compatible with your board.

Rev 1.0 doesn't support quad core Phenoms.


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#6
October 29, 2009 at 17:05:32
version 2.0, also it has been working well for over 12 months before my first psu blew I should have mentioned this before however I thought because it was a over voltage/current protected it would not affect the rest of the system the very first PSU was a corsair TX750w, that blew I sent it back for a refund and got a cheap win power model 800w Then I thought because it was very cheap it never had enough amps 2 run a system like mine and that was the reason it would not run at a high clock rate.
Same thing happened when I just installed a brand new OCZ 600W quad 12v rail model.
This is driving me mad the amount of money I have spent on trying different PSU's.

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#7
October 29, 2009 at 20:33:18
You do have the square 4 wire power connector that goes directly to the motherboard connected don't you?

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#8
October 29, 2009 at 20:36:45
The 4-pin plug sounds like a possibilty. What's the CPU temp reported as in the BIOS?

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#9
October 29, 2009 at 22:43:05
yes i have a 4 pin plug connected in the motherboard, CPU temp is staying around 30celsius.

All power connections are connected correctly.


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#10
October 30, 2009 at 06:07:02
Yes you should have mentioned the failed PSU.

Download and run a memory test program as a first step in hardware troubleshooting.

Sounds like the PSU failure may have damaged other components.

Probably best to strip down to the bare minimums and go from there. CPU/HS/fan, 1 stick of RAM, graphics, monitor, keyboard. In your case, because you are able to POST I would also keep a mouse and an optical drive.

Boot to a live version of Linux and run it off the CD. This will eliminate the hard drive and installed OS. If the same symptoms still appear then look at the motherboard or the CPU, or both as damaged. If possible you may wish to test the CPU in another computer.


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#11
October 30, 2009 at 07:10:29
I thought that all high quality PSU's (corsair) where designed to protect the components such as cpu and motherboard from a possible psu failure or over voltage.

However it does seem that, that is the case.
I will get a replacement motherboard I just hope the CPU is ok that was the most expensive part.

Thanks for your advice.


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#12
October 30, 2009 at 13:53:44
Can you access the bios with normal timing settings?

Playing to the angels
Les Paul (1915-2009)


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#13
November 4, 2009 at 14:43:09
Did you make the raid0 array and install xp with this mainboard or did you transfer the drives from a different system?

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#14
November 4, 2009 at 15:09:00
Wanderer:-
Actually its vista and yes I made made the raid array using the Motherboards on board sata controller
Jefro:-
The BIOS was not an issue in the first place however I am now 80% positive it is the motherboard that has failed. The other 20% could be the motherboard and CPU together. Corsair PSU's I put it down to, too sensitive to voltage fluctuations in household current. My house uses old fasioned radial wiring with a lot of devices connected to it such as fridge tumble dryer, ect...
I think because the corsair had auto voltage detection (110 or 240) that when an appliance connected to the radial circuit switched on, it created a major drop in voltage and the PSU switched to 110V mode and blew itself up. And as a result damaged the Motherboard.

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